Children's author Mo Willems on sparking creativity and joy

Author and illustrator Mo Willems has sold millions of children’s books and created beloved characters, including the Pigeon, Knuffle Bunny, and Elephant and Piggie. Now he’s the Kennedy Center’s first education artist-in-residence, making new kinds of work for both kids and adults. Correspondent Paul Solman talks to Willems about how he engages his audience.